tasks smoothly and easily. it allows us to move and to speak and to interact with our surroundings, requiring only minimal amount of effort. but when the brain is damaged, its true complex sit revealed. our subject this evening is the neurological disorders. these include parkinson's disease. stroke. huntington's disease and spinal chord injury. these conditions have taught us more about our brain than any other kind of brain disease. through parkinson's we have learned about movement. through stroke we have learned about speech. and through spinal cord injuries we have learned how thoughts give rise to actions. neurological diseases have been a topic of research for sent yees but-- century bus only recently have we developed effective treatments. this evening we will meet a group of scientists who have developed ways to repair or bypass the disordered brain. john done o hew. his work allowed paralyzed patients to move and communicate using only their thoughts and a machine called a brain computer interface. he is a professor at brown university and co-founder of a company called c

day weekend. >> it's going to put a hurting on us. >> reporter: there is a feeling here of relief that no one was hurt and that everyone will bounce back quickly. david? >> steve osunsami. steve, thanks very much. >>> the national hurricane center is tracking earl as we move into this holiday weekend. and so we turn to bill read again tonight, the head of the national hurricane center. and bill, where is earl right now and how long before we're out of the woods on this? >> right now, earl is south of new england and moving northeast at over 20 miles an hour. it will speed up overnight, come just south of nantucket and cape cod, and then move off into the canadian maritimes during the day on saturday. so, after people get up saturday morning, the skies are going to start clearing. >> and that is the good news. you told me earlier that you have your eye on several systems already in the pipeline. what does it look like? >> this is the wave that with us was gaston. another wave that came off of africa yesterday. these are ones that we are watching for potential development. and you c

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